Red Sonja, the Feral Scar

Exalted, double strike, wither
Whenever Red Sonja, the Feral Scar attacks alone,
it has menace. If it deals combat damage to a
player this way, it deals that much damage to each creature that
player controls. If it deals combat
damage to a Planeswalker this way, destroy it.
Whenever a nontoken creature dealt damage by
Red Sonja this turn dies, put a +1/+1 counter on
it, draw a card, and gain 1 life.